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Method
Rel. frost
Last spring frost (0°C) 10 May Frost 3 of 4 years · 20 years of data
Frost-free season 110 days 10 May – 28 Aug
Probability that frost is over

25% = Half of years are frost-free by this date. More about frost & season →

Custom date
Note: This location has a shorter growing season. Plants marked with Fleece, Greenhouse or Season too short need extra protection or are difficult to grow here.

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
22 Mar – 5 Apr
12 Jun
5-7 wk
10 May
17 Jul
0 wk
11 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
29 Mar – 12 Apr
24 Jun
4-6 wk
10 May
22 Jul
0 wk
11 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Greenhouse
25 Feb – 25 Mar
28 Mar
8-12 wk
20 May
23 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
22 Mar – 5 Apr
7 Jun
5-7 wk
10 May
12 Jul
0 wk
10 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
2 – 9 May
22 May
3-4 wk
30 May
12 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
Fleece
25 Apr – 2 May
23 May
4-5 wk
30 May
20 Jun
3 wk after
4 Jun
10 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
23 – 30 May
3-4 wk
20 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
15 Feb – 15 Mar
16 Mar
8-12 wk
10 May
11 May
0 wk
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
11 May
31 May
0 wk
11 May
21 May
0 wk
Maize
Zea mays
Fleece
22 – 29 Apr
12 May
3-4 wk
20 May
2 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
17 – 24 Apr
19 Jun
3-4 wk
15 May
10 Jul
1 wk after
23 May
30 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
10 May
1 Jul
0 wk
10 May
21 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
22 Mar – 5 Apr
7 Jun
5-7 wk
10 May
12 Jul
0 wk
10 May
2 Jul
0 wk
Potato
Solanum tuberosum
8 – 22 Apr
14 May
4-6 wk
20 May
11 Jun
1 wk after
20 May
1 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
22 Mar – 5 Apr
16 Jun
5-7 wk
10 May
21 Jul
0 wk
11 May
11 Jul
0 wk
Pumpkin
Cucurbita pepo
18 – 25 May
27 May
3-4 wk
15 Jun
17 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
17 – 24 Apr
22 May
3-4 wk
15 May
12 Jun
1 wk after
23 May
2 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
29 Mar – 12 Apr
19 Jun
4-6 wk
10 May
17 Jul
0 wk
Lettuce
Lactuca sativa
12 – 19 Apr
5 Jul
3-4 wk
10 May
26 Jul
0 wk
11 May
16 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
29 Mar – 12 Apr
19 Jun
4-6 wk
10 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
12 – 26 Apr
21 May
2-4 wk
10 May
4 Jun
0 wk
10 May
25 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
11 May
31 May
0 wk
11 May
21 May
0 wk
Spinach
Spinacia oleracea
12 – 19 Apr
21 Jul
3-4 wk
10 May
11 Aug
0 wk
7 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
4 – 18 Jun
4-6 wk
16 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
25 Mar – 8 Apr
21 Apr
6-8 wk
20 May
2 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
2 – 16 May
29 May
2-4 wk
30 May
12 Jun
3 wk after
22 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
29 Mar – 12 Apr
19 Jun
4-6 wk
10 May
17 Jul
0 wk
Garden pea
Pisum sativum
12 – 19 Apr
20 Jun
3-4 wk
10 May
11 Jul
0 wk
11 May
1 Jul
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Fleece
18 Apr – 2 May
15 May
4-6 wk
30 May
12 Jun
3 wk after
Lemon balm
Melissa officinalis
1 – 15 Mar
16 May
8-10 wk
10 May
11 Jul
0 wk
4 Jun
1 Jul
4 wk after
Dill
Anethum graveolens
11 May
10 Jul
0 wk
Wild chives
Allium schoenoprasum
15 – 29 Mar
31 May
6-8 wk
10 May
12 Jul
0 wk
11 May
2 Jul
0 wk
Spearmint
Mentha spicata
15 Feb – 15 Mar
17 May
8-12 wk
10 May
12 Jul
0 wk
4 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
10 May
30 Jul
0 wk
23 May
20 Jul
2 wk after
Garden sage
Salvia officinalis
6 – 20 Mar
2 May
8-10 wk
15 May
27 Jun
1 wk after
Common thyme
Thymus vulgaris
1 – 15 Mar
7 May
8-10 wk
10 May
2 Jul
0 wk
Oregano
Origanum vulgare
15 – 29 Mar
21 May
6-8 wk
10 May
2 Jul
0 wk
4 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
15 – 29 Mar
21 May
6-8 wk
10 May
2 Jul
0 wk
11 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
6 Feb – 6 Mar
16 Mar
10-14 wk
15 May
25 May
1 wk after

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
Fleece
2 – 9 May
22 May
3-4 wk
30 May
12 Jun
3 wk after
Cornflower
Centaurea cyanus
10 May
12 Jul
0 wk
11 May
2 Jul
0 wk
Statice
Limonium sinuatum
21 Mar – 4 Apr
16 Apr
8-10 wk
30 May
11 Jun
3 wk after
Sweet William
Dianthus barbatus
15 – 29 Mar
6-8 wk
10 May
0 wk
20 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
4 – 18 Apr
30 Apr
6-8 wk
30 May
11 Jun
3 wk after
16 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
28 Mar – 11 Apr
7 May
6-8 wk
23 May
18 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
9 Apr – 7 May
21 May
4-8 wk
4 Jun
18 Jun
4 wk after
4 Jun
8 Jun
4 wk after
Foxglove
Digitalis purpurea
1 – 15 Mar
8-10 wk
10 May
0 wk
23 May
2 wk after
Busy lizzie
Impatiens walleriana
23 Mar – 20 Apr
2 Jun
8-12 wk
15 Jun
28 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
4 – 18 Apr
10 May
6-8 wk
30 May
21 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
18 Apr – 2 May
4-6 wk
30 May
3 wk after
Chinese lantern
Physalis alkekengi
6 – 20 Mar
5 Apr
8-10 wk
15 May
31 May
1 wk after
Love in a mist
Nigella damascena
10 May
26 Jun
0 wk
11 May
16 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
25 Mar – 8 Apr
30 Apr
6-8 wk
20 May
11 Jun
1 wk after
29 Jun
7 wk after
Purple-top vervain
Verbena bonariensis
20 Feb – 20 Mar
5 Apr
8-12 wk
15 May
31 May
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
17 Feb – 17 Mar
18 Mar
8-12 wk
12 May
13 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
25 Feb – 25 Mar
23 Apr
8-12 wk
20 May
18 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
25 Mar – 8 Apr
7 May
6-8 wk
20 May
18 Jun
1 wk after
Corn poppy
Papaver rhoeas
10 May
11 Jul
0 wk
11 May
1 Jul
0 wk
Snapdragon
Antirrhinum majus
15 Feb – 15 Mar
6 May
8-12 wk
10 May
1 Jul
0 wk
20 May
21 Jun
1 wk after
Flossflower
Ageratum houstonianum
6 – 20 Apr
26 Apr
8-10 wk
15 Jun
21 Jun
5 wk after
Sweet pea
Lathyrus odoratus
15 Mar – 5 Apr
28 May
5-8 wk
10 May
2 Jul
0 wk
Stock
Matthiola incana
15 – 29 Mar
30 May
6-8 wk
10 May
11 Jul
0 wk
23 May
1 Jul
2 wk after
Wormwood
Artemisia absinthium
15 – 29 Mar
1 May
6-8 wk
10 May
12 Jun
0 wk
23 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
8 – 22 Apr
16 May
4-6 wk
20 May
13 Jun
1 wk after
Garden pansy
Viola × wittrockiana
1 – 15 Mar
17 May
8-10 wk
10 May
12 Jul
0 wk
20 May
2 Jul
1 wk after
Petunia
Petunia
7 Mar – 4 Apr
16 Apr
8-12 wk
30 May
11 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
20 Mar – 3 Apr
19 Apr
6-8 wk
15 May
31 May
1 wk after
22 Jun
6 wk after
Common zinnia
Zinnia elegans
18 Apr – 2 May
15 May
4-6 wk
30 May
12 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
25 Apr – 9 May
22 May
3-5 wk
30 May
12 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
18 Apr – 2 May
21 May
4-6 wk
30 May
18 Jun
3 wk after
22 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
23 Mar – 20 Apr
7 May
8-12 wk
15 Jun
2 Jul
5 wk after
Bee balm
Monarda didyma
15 Feb – 15 Mar
16 Apr
8-12 wk
10 May
11 Jun
0 wk
4 Jun
4 wk after
Yarrow
Achillea millefolium
15 – 29 Mar
1 Apr
6-8 wk
10 May
13 May
0 wk
23 May
2 wk after
Safflower
Carthamus tinctorius
10 May
12 Jun
0 wk
11 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
15 – 29 Mar
21 May
6-8 wk
10 May
2 Jul
0 wk
24 Apr
22 Jun
2 wk before
Bishop's flower
Ammi majus
29 Mar – 12 Apr
3 Jun
4-6 wk
10 May
1 Jul
0 wk
23 May
21 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
25 Feb – 11 Mar
27 Mar
10-12 wk
20 May
5 Jun
1 wk after
Sunflower
Helianthus annuus
2 – 9 May
24 May
3-4 wk
30 May
14 Jun
3 wk after
4 Jun
4 Jun
4 wk after
China aster
Callistephus chinensis
4 – 18 Apr
13 May
6-8 wk
30 May
24 Jun
3 wk after
22 Jun
6 wk after
Annual phlox
Phlox drummondii
25 Mar – 8 Apr
10 May
6-8 wk
20 May
21 Jun
1 wk after
22 Jun
6 wk after
Hollyhock
Alcea rosea
15 – 29 Mar
6-8 wk
10 May
0 wk
23 May
2 wk after
Alpine delphinium
Delphinium elatum
15 Feb – 15 Mar
16 Apr
8-12 wk
10 May
11 Jun
0 wk
4 Jun
4 wk after
African marigold
Tagetes erecta
4 – 18 Apr
10 May
6-8 wk
30 May
21 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
20 Mar – 3 Apr
3 May
6-8 wk
15 May
14 Jun
1 wk after
22 Jun
6 wk after
Wood sage
Salvia nemorosa
1 – 15 Mar
6 Apr
8-10 wk
10 May
1 Jun
0 wk
4 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
21 Mar – 18 Apr
1 May
6-10 wk
30 May
12 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
10 May
5 Jul
0 wk
11 May
25 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
11 – 25 Mar
25 Apr
8-10 wk
20 May
20 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
15 – 29 Mar
1 May
6-8 wk
10 May
12 Jun
0 wk
23 May
2 Jun
2 wk after